I was under the impression that the EDC used the Delphi magnetic dampers. Which would explain how they have variable stiffness that can be changed while driving. This system is also on the Ferrari 599 GTB. It uses iron shavings inside the dampers (shocks) along with current that magnetises the damper. More current would equal a stiffer ride.

I think this might be the case actually. I posted references to an article that stated all this, but the article is no longer available (new issue). Not sure how solid that source is, but that has been the only published info I've been able to uncover on the topic.